Heater for stitching machines



1. STANGL.

HEATER FORISTITCHING MACHINES. APPucATloN FILED ocT. 221919.

1,4287 17g Patented Sept. 12, 1922.

i CR

Patented Sept. 12.., 1922.

msnen sananet, or wnsr Benn, wisconsin.

y; i HEATER non s'rrronrne- MACHINES.

Application hledOctOber 22, 1919.'` Serial No. 332,464.`

To all -w/'Lom t may concern.' .y

Be it known that I, .losnrrr S'LANGL, a citizen of the UnitedStates, and resident of l/Vest Bend, in the county oidlllashington and State of iVisconsin, have invented new and useful `mprovements in Heaters for Stitching Machines, of which the following is a description, reference being' hadto the accompanying drawings, which are a part oll this specification. f

rlhe present invention relates to certain new and useful. improvements in heaters and refers more lparticularly to an electrical heater especially adapted ,for Ause in connection with shoe stitching or welting machines.

One object oil? the present .invention to provide an electrical heater of the class described, having two heating elements separately connected with a source of power supply whereby they may be used either jointly or separately.

Another object of my invention is to provide a heating device having a base ott iron, or other heat retaining substance, in which is embedded two or more heating elements connected with a source of supply and capable et' use either jointly or independently A 'further object of my invention is to provide a heater ot the class described, having a base member of heat retaining material encased 'within a container of heat insulating material such as asbestos or the like, and having an air space between the sides of.' the base member and the container'. p

fr still iurther object olf the present invention isto provide a heater ot the class described especially adapted tor use in connection with shoe stitching' and welting machines for maintaining wax, orthe like, in a liquid state for waxing the thread emy ployed by the stitching machine.

Vith the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement oi" parts substantially as hereina'l'ter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.`

In the accompanying drawing I have illustrated one complete example of the physical embodiment ofmy invention constructed according to the best mode I have so tar devised tor the practical; application of the principles thereof, and in which:` 051g. lis a perspective view of a portion or a shoe stitching or welting `machine equipped with my invention.

Fig. 2 is a perspective view of my novel form @theater detached from the stitching` `or welting machine, and

Fig. 3k is a longitudinal sectional `View through the heating machine.

Referring now more particularly to the accompanying drawing', the numeralf designates a shoe stitchingl or welting machine of' any desired-malte or construction having a casing G in which .is disposedthe heating means tor heating-the wax and maintaining the same vin a liquid condition. The novel form ot lheater which I employ comprises a container' 7 oif asbestos, or the like, and having its side andi-ear walls secured together by means of a U-shaped clip S and having` its liront end 9 secured to the sidewalls and the bottom by cement or any other desired means. It will be understood that the container "2' may bc moulded in one piece or may be formed in any other desired manner.

Disposed within the container is a base member l0 oiiron or any other heat retaining material and the base member has :itsv kends abutting the ends of the container 7 and its sides spaced 'from the sides of the container to provide an insulating' air space 1l therebetween. The member l0 has two or more pockets or recesses l2 formed therein in each of which is removably mounted an electrical heating unit 13.

Each heating unit 13 includes a body of insulatingl material in which .is embedded a resistance coil M, having its ends l5 connected with two contact poles 16, which project outwardly from the front end or" the heating element and through an adjacent opening l? in the end 9 of container 7.

Each heating' unit 13 is independently coupled with a suitable source of electrical supply by means of a feed wire 18 having one end i9 provided with a detachable connection for engagement with an electrical supply wire and its other end provided with connecting plug or socket 20 for detachable engagement with the contact poles 1G of the heating unit.

l hen it is desired to operate the stitchingl machine 5, both feed wires 1S are coupled i with the source of electrical supply so that the .resistance coils ifiwill be heated, and im* part their heat to the base member l0. lhe member il) is made relatively thick and has considerable capacity ilior reta iningheat. By operating, all ot the heatingl units, the wax which disposed in a receptacle (not shown) placed upon the base member l0 will soon be reduced to a liquid State, and ae the base member il() will retain this heat for a lonperiod ot time, it is unneeeeary to couple both heating elements and, therefore, but one ,ie maintained in connection with the electrical Supply wire. The end 9 and one oit the side walls of the container 7 are cut away (see Figure 2) 'for convenience in placingthe wax containing receptacle (not shown) upon the base member 10.

Freni the 'foregoing deScription taken in connection with the accompanyiup; drawing, it will be at once apparent that fl provide an electrica heater especially adapted in use ttor melting wax used in connection with shoe atitchingl or welting machines, which will be simple in construction and lnfactieal 4lor the purpose described.

What I claim. as my invention is:

1. A heating unit comprising a container, a, base member disposed in Said container and havinglarge capacity lor retaining` heat, spaced Substantially parallel pockets in said member, a heating element disposed in each pocket, and meane independently connectingl the heating elemente` 'with a source ol power, wherebyv the heatinl elements may be singly or ointly employed to heat Said meinber.

2. A heating unit comprising a container ol" heat insulating material, a base member disposed in said coiitaincr and spaced lroni the side walls thereof to provide an air ineulating` space, said member having large capacity tor retainingheat, a pocket in Said member, and a heating element disposed in said pocket.

3. A heating unit comprising a container of heat insulating` material, a base member disposed in Said container and en )aecd 'troni the side walls thereof to provide :in air insulating space, a pocket in said member, said base member being` 'termed ot material pos-sA Sesein` large capacity :For retainingheat, a. pair oi spaced apart pockets in the bave member, a heating; elen'lent diepoeefl in each pocket, and independent connecticut: he tween the lieat'ing` elemente and a Source el' power, whereby both ot said ,heating eieinents may be connected `with the Source ol" power at one time to sul etantially obtain the instant heatingoil? the base member and one olt the heating` members then cnt out to maintain the base member at the desired heat.

In testimony whereoli, l atti): my signature.

J O SEPH STA NG L. 

